<!DOCTYPE html>
<html>

	<head>
		<meta http-equiv="Content-type" content="text/html; charset=utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=0">
		<meta name="apple-mobile-web-app-capable" content="yes" />
		<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<title>iScroll-5 DEMO: Pull to Refresh + Infinite Next Page load</title>
		<link rel="stylesheet" type="text/css" href="afui/icons.css">
		<link rel="stylesheet" type="text/css" href="afui/af.ui.css">
		<script type="text/javascript" src="js/libs/jquery.min.js"></script>
		<script type="text/javascript" src="js/libs/iscroll-probe.js"></script>
		<script type="text/javascript" src="js/libs/fastclick.js"></script>
		<script type="text/javascript" src="afui/appframework.ui.js"></script>
		<script type="text/javascript">
			$(document).ready(function() {
				$.afui.launch();
			});
			var items_per_page = 10;
			var scroll_in_progress = false;
			var myScroll;
			load_content = function(refresh, next_page) {
				// This is a DEMO function which generates DEMO content into the scroller.
				// Here you should place your AJAX request to fetch the relevant content (e.g. $.post(...))
				console.log(refresh, next_page);
				setTimeout(function() { // This immitates the CALLBACK of your AJAX function
					if (!refresh) {
						// Loading the initial content
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row initial content</li>');
					} else if (refresh && !next_page) {
						// Refreshing the content
						$('#wrapper > #scroller > ul').html('');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row Refreshed</li>');
					} else if (refresh && next_page) {
						// Loading the next-page content and refreshing
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
						$('#wrapper > #scroller > ul').append('<li>Pretty row X</li>');
					}
					if (refresh) {
						myScroll.refresh();
						pullActionCallback();
					} else {
						if (myScroll) {
							myScroll.destroy();
							$(myScroll.scroller).attr('style', ''); // Required since the styles applied by IScroll might conflict with transitions of parent layers.
							myScroll = null;
						}
						trigger_myScroll();
					}
				}, 1000);
			};

			function pullDownAction() {
				load_content('refresh');
				$('#wrapper > #scroller > ul').data('page', 1);
				// Since "topOffset" is not supported with iscroll-5
				$('#wrapper > .scroller').css({
					top: 0
				});
			}

			function pullUpAction(callback) {
				if ($('#wrapper > #scroller > ul').data('page')) {
					var next_page = parseInt($('#wrapper > #scroller > ul').data('page'), 10) + 1;
				} else {
					var next_page = 2;
				}
				load_content('refresh', next_page);
				$('#wrapper > #scroller > ul').data('page', next_page);
				if (callback) {
					callback();
				}
			}

			function pullActionCallback() {
				if (pullDownEl && pullDownEl.className.match('loading')) {
					pullDownEl.className = 'pullDown';
					pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Pull down to refresh';
					myScroll.scrollTo(0, parseInt(pullUpOffset) * (-1), 60);
				} else if (pullUpEl && pullUpEl.className.match('loading')) {
					$('.pullUp').removeClass('loading').html('');
				}
			}
			var pullActionDetect = {
				count: 0,
				limit: 10,
				check: function(count) {
					if (count) {
						pullActionDetect.count = 0;
					}
					// Detects whether the momentum has stopped, and if it has reached the end - 200px of the scroller - it trigger the pullUpAction
					setTimeout(function() {
						if (myScroll.y <= (myScroll.maxScrollY + 60) && pullUpEl && !pullUpEl.className.match('loading')) {
							$('.pullUp').addClass('loading').html('<span class="pullUpIcon">&nbsp;</span><span class="pullUpLabel">Loading...</span>');
							pullUpAction();
						} else if (pullActionDetect.count < pullActionDetect.limit) {
							pullActionDetect.check();
							pullActionDetect.count++;
						}
					}, 200);
				}
			}

			function trigger_myScroll(offset) {
				pullDownEl = document.querySelector('#wrapper .pullDown');
				if (pullDownEl) {
					pullDownOffset = pullDownEl.offsetHeight;
				} else {
					pullDownOffset = 0;
				}
				pullUpEl = document.querySelector('#wrapper .pullUp');
				if (pullUpEl) {
					pullUpOffset = pullUpEl.offsetHeight;
				} else {
					pullUpOffset = 0;
				}
				if ($('#wrapper ul > li').length < items_per_page) {
					// If we have only 1 page of result - we hide the pullup and pulldown indicators.
					$('#wrapper .pullDown').hide();
					$('#wrapper .pullUp span').hide();
					offset = 0;
				} else if (!offset) {
					// If we have more than 1 page of results and offset is not manually defined - we set it to be the pullUpOffset.
					offset = pullUpOffset;
				}
				myScroll = new IScroll('#wrapper', {
					probeType: 1,
					tap: true,
					click: false,
					preventDefaultException: {
						tagName: /.*/
					},
					mouseWheel: true,
					scrollbars: true,
					fadeScrollbars: true,
					interactiveScrollbars: false,
					keyBindings: false,
					deceleration: 0.0002,
					startY: (parseInt(offset) * (-1))
				});
				myScroll.on('scrollStart', function() {
					scroll_in_progress = true;
				});
				myScroll.on('scroll', function() {
					scroll_in_progress = true;
					if ($('#wrapper ul > li').length >= items_per_page) {
						if (this.y >= 5 && pullDownEl && !pullDownEl.className.match('flip')) {
							pullDownEl.className = 'pullDown flip';
							pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Release to refresh';
							this.minScrollY = 0;
						} else if (this.y <= 5 && pullDownEl && pullDownEl.className.match('flip')) {
							pullDownEl.className = 'pullDown';
							pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Pull down to refresh';
							this.minScrollY = -pullDownOffset;
						}
						console.log(this.y);
						pullActionDetect.check(0);
					}
				});
				myScroll.on('scrollEnd', function() {
					console.log('scroll ended');
					setTimeout(function() {
						scroll_in_progress = false;
					}, 100);
					if ($('#wrapper ul > li').length >= items_per_page) {
						if (pullDownEl && pullDownEl.className.match('flip')) {
							pullDownEl.className = 'pullDown loading';
							pullDownEl.querySelector('.pullDownLabel').innerHTML = 'Loading...';
							pullDownAction();
						}
						// We let the momentum scroll finish, and if reached the end - loading the next page
						pullActionDetect.check(0);
					}
				});
				// In order to prevent seeing the "pull down to refresh" before the iScoll is trigger - the wrapper is located at left:-9999px and returned to left:0 after the iScoll is initiated
				setTimeout(function() {
					$('#wrapper').css({
						left: 0
					});
				}, 100);
			}

			function loaded() {
				load_content();
			}
			document.addEventListener('touchmove', function(e) {
				e.preventDefault();
			}, false);
		</script>

		<style type="text/css">
			* {
				-webkit-box-sizing: border-box;
				-moz-box-sizing: border-box;
				box-sizing: border-box;
			}
	
			html {
				-ms-touch-action: none;
			}
	
			body,ul,li {
				padding: 0;
				margin: 0;
				border: 0;
			}
	
			body {
				font-size: 12px;
				font-family: ubuntu, helvetica, arial;
				overflow: hidden; /* this is important to prevent the whole page to bounce */
			}
	
			#wrapper {
				position: absolute;
				z-index: 1;
				top: 0px;
				bottom: 0px;
				left:9999px; /* Not a must - can be 0 - but it makes the appearance of the content a bit nicer */
				width: 100%;
				background: #ccc;
				overflow: hidden;
			}
	
			#scroller {
				position: absolute;
				z-index: 1;
				-webkit-tap-highlight-color: rgba(0,0,0,0);
				width: 100%;
				-webkit-transform: translateZ(0);
				-moz-transform: translateZ(0);
				-ms-transform: translateZ(0);
				-o-transform: translateZ(0);
				transform: translateZ(0);
				-webkit-touch-callout: none;
				-webkit-user-select: none;
				-moz-user-select: none;
				-ms-user-select: none;
				user-select: none;
				-webkit-text-size-adjust: none;
				-moz-text-size-adjust: none;
				-ms-text-size-adjust: none;
				-o-text-size-adjust: none;
				text-size-adjust: none;
			}
	
			#scroller ul {
				list-style: none;
				padding: 0;
				margin: 0;
				width: 100%;
				text-align: left;
			}
	
			#scroller li {
				padding: 0 10px;
				height: 80px;
				line-height: 80px;
				border-bottom: 1px solid #ccc;
				border-top: 1px solid #fff;
				background-color: #fafafa;
				font-size: 14px;
			}
	
			.pullDownLabel, .pullUpLabel {color:#999}
			.pullDown, .pullUp {background:#fff;height:40px;line-height:40px;font-weight:bold;font-size:0.8em;color:#888}
			.pullDown .pullDownIcon, .pullUp .pullUpIcon {display:block;float:left;opacity:0.4;width:40px;height:40px;background:url(images/pull_to_refresh.png) 0 0 no-repeat;-webkit-background-size:40px 80px;-ms-background-size:40px 80px; background-size:40px 80px;-webkit-transition-property:-webkit-transform;-ms-transition-property:-webkit-transform;-webkit-transition-duration:250ms;-ms-transition-duration:250ms}
			.pullDown .pullDownIcon {-webkit-transform:rotate(0deg) translateZ(0);-ms-transform:rotate(0deg) translateZ(0)}
			.pullUp .pullUpIcon  {-webkit-transform:rotate(-180deg) translateZ(0);-ms-transform:rotate(-180deg) translateZ(0)}
			.pullDown.flip .pullDownIcon {-webkit-transform:rotate(-180deg) translateZ(0);-ms-transform:rotate(-180deg) translateZ(0)}
			.pullUp.flip .pullUpIcon {-webkit-transform:rotate(0deg) translateZ(0);-ms-transform:rotate(0deg) translateZ(0)}
			.pullDown.loading .pullDownIcon, .pullUp.loading .pullUpIcon {background-position:0 100%;-webkit-transform:rotate(0deg) translateZ(0);-ms-transform:rotate(0deg) translateZ(0);-webkit-transition-duration:0ms;-ms-transition-duration:0ms;-webkit-animation-name:loading;-ms-animation-name:loading;-webkit-animation-duration:1s;-ms-animation-duration:1s;-webkit-animation-iteration-count:infinite;-ms-animation-iteration-count:infinite;-webkit-animation-timing-function:linear;-ms-animation-timing-function:linear}
			@-webkit-keyframes loading {
				from {-webkit-transform:rotate(0deg) translateZ(0)}
				to {-webkit-transform:rotate(360deg) translateZ(0)}
			}
			@-ms-keyframes loading {
				from {-ms-transform:rotate(0deg) translateZ(0)}
				to {-ms-transform:rotate(360deg) translateZ(0)}
			}
		</style>
	</head>

	<body onload="loaded()">
		<div class="view">
			<header>
				<h1>iscroll5</h1>
			</header>
			<div class="pages">
				<!--Tab View Pages-->
				<div id="main" class="panel" data-title="iscroll5" id="main" data-selected="true">
					<div id="wrapper">
						<div id="scroller">
							<div class="pullDown">
								<span class="pullDownIcon">&nbsp;</span>
								<span class="pullDownLabel">Pull down to refresh...</span>
							</div>
							<ul></ul>
							<div class="pullUp"></div>
						</div>
					</div>
				</div>
			</div>
		</div>
	</body>

</html>